*1:See also https://sumita-m.hatenadiary.com/entry/20130328/1364434114 https://sumita-m.hatenadiary.com/entry/2020/03/21/020825 https://sumita-m.hatenadiary.com/entry/2020/03/25/024841 https://sumita-m.hatenadiary.com/entry/2020/04/02/221024 https://sumita-m.hatenadiary.com/entry/2021/03/17/082547 https://sumita-m.hatenadiary.com/entry/2021/03/18/091549 https://sumita-m.hatenadiary.com/entry/2021/03/30/085051 https://sumita-m.hatenadiary.com/entry/2022/02/25/161412 https://sumita-m.hatenadiary.com/entry/2022/03/03/173047 https://sumita-m.hatenadiary.com/entry/2022/03/17/151533 https://sumita-m.hatenadiary.com/entry/2022/04/02/093400 https://sumita-m.hatenadiary.com/entry/2022/04/06/101520 https://sumita-m.hatenadiary.com/entry/2022/04/09/081328
